Fixes some facehugger bugs

code/modules/mob/living/carbon/alien/special/facehugger.dm

@@ -20,6 +20,8 @@
 	tint = 3
 	flags_cover = MASKCOVERSEYES | MASKCOVERSMOUTH
 	layer = MOB_LAYER
+	obj_integrity = 100
+	max_integrity = 100
 
 	var/stat = CONSCIOUS //UNCONSCIOUS is the idle state in this case
 
@@ -43,20 +45,28 @@
 	item_state = "facehugger_impregnated"
 	stat = DEAD
 
+/obj/item/clothing/mask/facehugger/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
+	..()
+	if(obj_integrity < 90)
+		Die()
+
+/obj/item/clothing/mask/facehugger/attackby(obj/item/O, mob/user, params)
+	return O.attack_obj(src, user)
+
 /obj/item/clothing/mask/facehugger/attack_alien(mob/user) //can be picked up by aliens
 	attack_hand(user)
 	return
 
 /obj/item/clothing/mask/facehugger/attack_hand(mob/user)
 	if((stat == CONSCIOUS && !sterile) && !isalien(user))
-		if(Attach(user))
+		if(Leap(user))
 			return
 	..()
 
 /obj/item/clothing/mask/facehugger/attack(mob/living/M, mob/user)
 	..()
-	if(user.temporarilyRemoveItemFromInventory(src))
-		Attach(M)
+	if(user.transferItemToLoc(src, get_turf(M)))
+		Leap(M)
 
 /obj/item/clothing/mask/facehugger/examine(mob/user)
 	..()
@@ -70,19 +80,10 @@
 	if (sterile)
 		to_chat(user, "<span class='boldannounce'>It looks like the proboscis has been removed.</span>")
 
-/obj/item/clothing/mask/facehugger/attackby(obj/item/O,mob/m, params)
-	if(O.force)
-		Die()
-	return
-
-/obj/item/clothing/mask/facehugger/bullet_act(obj/item/projectile/P)
-	if(P.damage)
-		Die()
 
 /obj/item/clothing/mask/facehugger/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	if(exposed_temperature > 300)
 		Die()
-	return
 
 /obj/item/clothing/mask/facehugger/equipped(mob/M)
 	Attach(M)
@@ -98,7 +99,7 @@
 
 /obj/item/clothing/mask/facehugger/HasProximity(atom/movable/AM as mob|obj)
 	if(CanHug(AM) && Adjacent(AM))
-		return Attach(AM)
+		return Leap(AM)
 	return 0
 
 /obj/item/clothing/mask/facehugger/throw_at(atom/target, range, speed, mob/thrower, spin=1, diagonals_first = 0, datum/callback/callback)
@@ -116,7 +117,7 @@
 	..()
 	if(stat == CONSCIOUS)
 		icon_state = "[initial(icon_state)]"
-		Attach(hit_atom)
+		Leap(hit_atom)
 
 /obj/item/clothing/mask/facehugger/proc/valid_to_attach(mob/living/M)
 	// valid targets: corgis, carbons except aliens and devils
@@ -144,9 +145,13 @@
 		// corgi: valid
 		return TRUE
 
-/obj/item/clothing/mask/facehugger/proc/Attach(mob/living/M)
+/obj/item/clothing/mask/facehugger/proc/Leap(mob/living/M)
 	if(!valid_to_attach(M))
 		return FALSE
+	if(iscarbon(M))
+		var/mob/living/carbon/target = M
+		if(target.wear_mask && istype(target.wear_mask, /obj/item/clothing/mask/facehugger))
+			return FALSE
 	// passed initial checks - time to leap!
 	M.visible_message("<span class='danger'>[src] leaps at [M]'s face!</span>", \
 							"<span class='userdanger'>[src] leaps at [M]'s face!</span>")
@@ -165,11 +170,15 @@
 
 		if(target.wear_mask)
 			var/obj/item/clothing/W = target.wear_mask
-			if(!istype(W,/obj/item/clothing/mask/facehugger) && target.dropItemToGround(W))
+			if(target.dropItemToGround(W))
 				target.visible_message("<span class='danger'>[src] tears [W] off of [target]'s face!</span>", \
 									"<span class='userdanger'>[src] tears [W] off of [target]'s face!</span>")
-		forceMove(target)
 		target.equip_to_slot_if_possible(src, slot_wear_mask, 0, 1, 1)
+	return TRUE // time for a smoke
+
+/obj/item/clothing/mask/facehugger/proc/Attach(mob/living/M)
+	if(!valid_to_attach(M))
+		return
 	// early returns and validity checks done: attach.
 	attached++
 	//ensure we detach once we no longer need to be attached
@@ -189,8 +198,6 @@
 
 	addtimer(CALLBACK(src, .proc/Impregnate, M), rand(MIN_IMPREGNATION_TIME, MAX_IMPREGNATION_TIME))
 
-	return TRUE // time for a smoke
-
 /obj/item/clothing/mask/facehugger/proc/detach()
 	attached = 0